I don't have ITCK, but the Mind's Eye is great (see SeveredHead's sig for link). It's a lot like a splatbook for Psionic classes, but it actually seems a bit stronger, so the classes end up pretty well balanced if you use it.
And yes, to support Shard, Constructors are great. The Shadow Adept is also pretty darn cool. Oh, and the Crystalsinger is very nice too, at least the first four levels. Arch Psion isn't bad either, although it's pretty difficult to keep three disciplines up.
They just posted a new update over Christmas that had 19 new Talents (some of which are VERY nice, I like Astral Spider), a set of Feats that let you trade extra Talent manifestations for other cool abilities (basically, they're the analogs of the Paladin feats like Divine Might, and are GREAT for Psychic Warriors), and a set of cheap items (200gp each) that let you use your Talent manifestations to cast Talents you don't know.